ZXDN-3A: On-Site Three-Phase Energy Meter Calibrator

Introduction

The ZXDN-3A Three-Phase Energy Meter On-Site Calibrator is a high-precision instrument designed for electrical parameter measurement, energy meter verification, and wiring configuration analysis. Equipped with high-accuracy voltage and current transformers, as well as clamp-type current transformers, it enables non-intrusive measurements without disconnecting the current circuit. Its large color LCD display, full Chinese graphical interface, and touch-sensitive silicone keyboard provide user-friendly operation. With built-in large-capacity storage, it can save up to 1,000 sets of calibration results and supports data upload to computers for further analysis.

Performance Features

1.Multi-Functional Verification: Integrates energy meter calibration, electrical parameter measurement, and power quality analysis (waveform distortion, voltage fluctuations, and three-phase unbalance).

2.Online Error Detection: Measures comprehensive errors of metering equipment under actual load without power interruption or circuit modification.

3.Electrical Parameter Measurement: Measures voltage, current, active/reactive power, phase angle, power factor, and frequency to calculate measurement errors.

4.Virtual Load Option: Supports accurate meter calibration even under no-load or ultra-low load conditions when paired with an optional virtual load box.

5.Vector Diagram & Wiring Analysis: Displays voltage/current vector diagrams and automatically identifies 48 wiring configurations for three-phase three-wire systems. Includes automatic calculation of corrective electricity values.

6.Clamp-Type CTs: Allows safe and convenient current measurement without breaking the circuit.

7.Broad Compatibility: Calibrates indicating instruments (voltmeters, ammeters, power meters, phase meters) and single/three-phase energy meters (1A/5A, active/reactive).

8.Flexible Calibration Methods: Supports photoelectric, manual, and pulse-based calibration.

9.Power Quality Analysis: Measures frequency deviation, voltage deviation, voltage fluctuations, three-phase unbalance, and harmonics.

10.Waveform Display: Shows single-phase or three-phase voltage/current waveforms.

11.Load Fluctuation Monitoring: Records and stores parameters like voltage, current, power, frequency, and phase for dynamic analysis.

12.Real-Time Monitoring: Assists in troubleshooting during power equipment adjustment and operation.

13.Barcode Scanner Option: Enables automatic meter barcode entry.

14.RS485 Communication Testing: Verifies communication interfaces of smart meters and supports demand error calibration.

15.Data Management: Features a calendar/clock function, onboard data storage, and USB/RS232 interfaces for data export.

16.Portable Design: Compact and lightweight for both field and laboratory use.

Technical Specifications

1.Input Characteristics:

Voltage Range: 0–400V (auto-ranging across 57.7V/100V/220V/400V).

Current Range: 0–5A (built-in CT), with clamp options: 5A/25A (small clamp), 100A/500A (medium clamp), 400A/2000A (large clamp).

Phase Angle: 0–359.999°.

Frequency: 45–55Hz.

2.Accuracy (0.05% standard; 0.02% optional):

Voltage: ±0.05%

Current: ±0.05% (±0.5% with clamp)

Active Power: ±0.05% (±0.5% with clamp)

Reactive Power: ±0.3% (±1.0% with clamp)

Energy: ±0.05% (active), ±0.3% (reactive)

Frequency: ±0.05%

Phase: ±0.2°

3.Power Quality Accuracy:

Fundamental Voltage/Current: ≤0.5% F.S. (voltage), ≤1% F.S. (current)

Phase Error: ≤0.5°

THD Voltage/Current: ≤0.1%/≤0.2%

Unbalance Error: ≤0.2%

4.Operating Temperature: –10℃ to +40℃

5.Insulation:

Input-Envelope Resistance: ≥100 MΩ

Withstands 1.5 kV AC for 1 minute

6.Pulse Constants:

Built-in CT: 10,000 pulses/kWh

Clamp CTs: 5A–25A (10,000–2,000 pulses/kWh), 100A–500A (500–100 pulses/kWh), 400A–2000A (125–25 pulses/kWh)

7.Weight & Dimensions: 2 kg; 32×24×13 cm

Comparative Advantages

Compared to traditional calibrators, the ZXDN-3A offers superior integration of metering calibration and power quality analysis. Its support for clamp-on CTs eliminates the need for current circuit interruption, enhancing field efficiency. Unlike simpler devices, it provides advanced features like vector-based wiring analysis, harmonic measurement, and RS485 communication testing, making it suitable for modern smart grid applications. The optional virtual load box and barcode scanner further extend its utility in diverse scenarios.

Applications

Ideal for utility companies, industrial power departments, and calibration laboratories, the ZXDN-3A ensures accurate on-site verification of energy meters and comprehensive power quality assessment, supporting efficient and reliable grid operation.

GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/